{"id":"S87006807","label":"Water--Purification--Radon removal","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh87006807","normalized_label":"water--purification--radon removal","broader":[],"aliases":["Radon removal (Water purification)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh87006807","provider":"lcsh","revision":"b44809459957b518","taxonomy_revision":"f050b5d4780b1289","title":"Water--Purification--Radon removal","url":"/topics/S87006807","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5209763444282507780","address_version":"morton4x16-v1","coordinates":[0,20,48761,23552],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}